Everyone is different, but when I had relationship issues in the past I did what I enjoyed most, and one of those things is .. well .. video games. It kept me from thinking of things too negatively. It was not a complete substitute, however. And I did not feel better overnight, but it was a good distraction. Feeling sorry for yourself is not going to make things better (so please avoid that trap). If you have close friends you can chill with maybe you should hang with them for a bit too. I suggest playing vgames lite and doing other thing with friends of personal building if you can.
If I were you I'd avoid having serious contact with chicks for a bit too. If you get seriously invested you might confuse your feelings if you got close to another girl too soon. That won't be good for anybody involved.
Don't feel too bad though. These things happen. I remember my first girlfriend many years ago. I told myself she would be my first and last and I never wanted anybody else. I've had 4 girlfriends and too many flings to count since then lol Don't get hung up over your first relationship. Personally, I find we should explore other people to learn what we want in the process (it's not always obvious). It is the only way. Most people who settle in their first relationships told me they regretted it. So perhaps, it was for the best (you may not see it that way now, but maybe in time you will).
Playstation = The Beast from the East
Sony + Nintendo = WIN! PS3 + PSV + PS4 + Wii U + 3DS
